Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 323 insertions, 0 deletions

diff --git a/kernel/sound/pci/lola/lola_clock.c b/kernel/sound/pci/lola/lola_clock.c
new file mode 100644
index 000000000..2bef6b412
--- /dev/null
+++ b/kernel/sound/pci/lola/lola_clock.c
@@ -0,0 +1,323 @@
+/*
+ *  Support for Digigram Lola PCI-e boards
+ *
+ *  Copyright (c) 2011 Takashi Iwai <tiwai@suse.de>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License as published by the Free
+ *  Software Foundation; either version 2 of the License, or (at your option)
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ *  more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with
+ *  this program; if not, write to the Free Software Foundation, Inc., 59
+ *  Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include "lola.h"
+
+unsigned int lola_sample_rate_convert(unsigned int coded)
+{
+	unsigned int freq;
+
+	/* base frequency */
+	switch (coded & 0x3) {
+	case 0:     freq = 48000; break;
+	case 1:     freq = 44100; break;
+	case 2:     freq = 32000; break;
+	default:    return 0;   /* error */
+	}
+
+	/* multiplier / devisor */
+	switch (coded & 0x1c) {
+	case (0 << 2):    break;
+	case (4 << 2):    break;
+	case (1 << 2):    freq *= 2; break;
+	case (2 << 2):    freq *= 4; break;
+	case (5 << 2):    freq /= 2; break;
+	case (6 << 2):    freq /= 4; break;
+	default:        return 0;   /* error */
+	}
+
+	/* ajustement */
+	switch (coded & 0x60) {
+	case (0 << 5):    break;
+	case (1 << 5):    freq = (freq * 999) / 1000; break;
+	case (2 << 5):    freq = (freq * 1001) / 1000; break;
+	default:        return 0;   /* error */
+	}
+	return freq;
+}
+
+/*
+ * Granualrity
+ */
+
+#define LOLA_MAXFREQ_AT_GRANULARITY_MIN         48000
+#define LOLA_MAXFREQ_AT_GRANULARITY_BELOW_MAX   96000
+
+static bool check_gran_clock_compatibility(struct lola *chip,
+					   unsigned int val,
+					   unsigned int freq)
+{
+	if (!chip->granularity)
+		return true;
+
+	if (val < LOLA_GRANULARITY_MIN || val > LOLA_GRANULARITY_MAX ||
+	    (val % LOLA_GRANULARITY_STEP) != 0)
+		return false;
+
+	if (val == LOLA_GRANULARITY_MIN) {
+		if (freq > LOLA_MAXFREQ_AT_GRANULARITY_MIN)
+			return false;
+	} else if (val < LOLA_GRANULARITY_MAX) {
+		if (freq > LOLA_MAXFREQ_AT_GRANULARITY_BELOW_MAX)
+			return false;
+	}
+	return true;
+}
+
+int lola_set_granularity(struct lola *chip, unsigned int val, bool force)
+{
+	int err;
+
+	if (!force) {
+		if (val == chip->granularity)
+			return 0;
+#if 0
+		/* change Gran only if there are no streams allocated ! */
+		if (chip->audio_in_alloc_mask || chip->audio_out_alloc_mask)
+			return -EBUSY;
+#endif
+		if (!check_gran_clock_compatibility(chip, val,
+						    chip->clock.cur_freq))
+			return -EINVAL;
+	}
+
+	chip->granularity = val;
+	val /= LOLA_GRANULARITY_STEP;
+
+	/* audio function group */
+	err = lola_codec_write(chip, 1, LOLA_VERB_SET_GRANULARITY_STEPS,
+			       val, 0);
+	if (err < 0)
+		return err;
+	/* this can be a very slow function !!! */
+	usleep_range(400 * val, 20000);
+	return lola_codec_flush(chip);
+}
+
+/*
+ * Clock widget handling
+ */
+
+int lola_init_clock_widget(struct lola *chip, int nid)
+{
+	unsigned int val;
+	int i, j, nitems, nb_verbs, idx, idx_list;
+	int err;
+
+	err = lola_read_param(chip, nid, LOLA_PAR_AUDIO_WIDGET_CAP, &val);
+	if (err < 0) {
+		dev_err(chip->card->dev, "Can't read wcaps for 0x%x\n", nid);
+		return err;
+	}
+
+	if ((val & 0xfff00000) != 0x01f00000) { /* test SubType and Type */
+		dev_dbg(chip->card->dev, "No valid clock widget\n");
+		return 0;
+	}
+
+	chip->clock.nid = nid;
+	chip->clock.items = val & 0xff;
+	dev_dbg(chip->card->dev, "clock_list nid=%x, entries=%d\n", nid,
+		    chip->clock.items);
+	if (chip->clock.items > MAX_SAMPLE_CLOCK_COUNT) {
+		dev_err(chip->card->dev, "CLOCK_LIST too big: %d\n",
+		       chip->clock.items);
+		return -EINVAL;
+	}
+
+	nitems = chip->clock.items;
+	nb_verbs = (nitems + 3) / 4;
+	idx = 0;
+	idx_list = 0;
+	for (i = 0; i < nb_verbs; i++) {
+		unsigned int res_ex;
+		unsigned short items[4];
+
+		err = lola_codec_read(chip, nid, LOLA_VERB_GET_CLOCK_LIST,
+				      idx, 0, &val, &res_ex);
+		if (err < 0) {
+			dev_err(chip->card->dev, "Can't read CLOCK_LIST\n");
+			return -EINVAL;
+		}
+
+		items[0] = val & 0xfff;
+		items[1] = (val >> 16) & 0xfff;
+		items[2] = res_ex & 0xfff;
+		items[3] = (res_ex >> 16) & 0xfff;
+
+		for (j = 0; j < 4; j++) {
+			unsigned char type = items[j] >> 8;
+			unsigned int freq = items[j] & 0xff;
+			int format = LOLA_CLOCK_FORMAT_NONE;
+			bool add_clock = true;
+			if (type == LOLA_CLOCK_TYPE_INTERNAL) {
+				freq = lola_sample_rate_convert(freq);
+				if (freq < chip->sample_rate_min)
+					add_clock = false;
+				else if (freq == 48000) {
+					chip->clock.cur_index = idx_list;
+					chip->clock.cur_freq = 48000;
+					chip->clock.cur_valid = true;
+				}
+			} else if (type == LOLA_CLOCK_TYPE_VIDEO) {
+				freq = lola_sample_rate_convert(freq);
+				if (freq < chip->sample_rate_min)
+					add_clock = false;
+				/* video clock has a format (0:NTSC, 1:PAL)*/
+				if (items[j] & 0x80)
+					format = LOLA_CLOCK_FORMAT_NTSC;
+				else
+					format = LOLA_CLOCK_FORMAT_PAL;
+			}
+			if (add_clock) {
+				struct lola_sample_clock *sc;
+				sc = &chip->clock.sample_clock[idx_list];
+				sc->type = type;
+				sc->format = format;
+				sc->freq = freq;
+				/* keep the index used with the board */
+				chip->clock.idx_lookup[idx_list] = idx;
+				idx_list++;
+			} else {
+				chip->clock.items--;
+			}
+			if (++idx >= nitems)
+				break;
+		}
+	}
+	return 0;
+}
+
+/* enable unsolicited events of the clock widget */
+int lola_enable_clock_events(struct lola *chip)
+{
+	unsigned int res;
+	int err;
+
+	err = lola_codec_read(chip, chip->clock.nid,
+			      LOLA_VERB_SET_UNSOLICITED_ENABLE,
+			      LOLA_UNSOLICITED_ENABLE | LOLA_UNSOLICITED_TAG,
+			      0, &res, NULL);
+	if (err < 0)
+		return err;
+	if (res) {
+		dev_warn(chip->card->dev, "error in enable_clock_events %d\n",
+		       res);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+int lola_set_clock_index(struct lola *chip, unsigned int idx)
+{
+	unsigned int res;
+	int err;
+
+	err = lola_codec_read(chip, chip->clock.nid,
+			      LOLA_VERB_SET_CLOCK_SELECT,
+			      chip->clock.idx_lookup[idx],
+			      0, &res, NULL);
+	if (err < 0)
+		return err;
+	if (res) {
+		dev_warn(chip->card->dev, "error in set_clock %d\n", res);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+bool lola_update_ext_clock_freq(struct lola *chip, unsigned int val)
+{
+	unsigned int tag;
+
+	/* the current EXTERNAL clock information gets updated by interrupt
+	 * with an unsolicited response
+	 */
+	if (!val)
+		return false;
+	tag = (val >> LOLA_UNSOL_RESP_TAG_OFFSET) & LOLA_UNSOLICITED_TAG_MASK;
+	if (tag != LOLA_UNSOLICITED_TAG)
+		return false;
+
+	/* only for current = external clocks */
+	if (chip->clock.sample_clock[chip->clock.cur_index].type !=
+	    LOLA_CLOCK_TYPE_INTERNAL) {
+		chip->clock.cur_freq = lola_sample_rate_convert(val & 0x7f);
+		chip->clock.cur_valid = (val & 0x100) != 0;
+	}
+	return true;
+}
+
+int lola_set_clock(struct lola *chip, int idx)
+{
+	int freq = 0;
+	bool valid = false;
+
+	if (idx == chip->clock.cur_index) {
+		/* current clock is allowed */
+		freq = chip->clock.cur_freq;
+		valid = chip->clock.cur_valid;
+	} else if (chip->clock.sample_clock[idx].type ==
+		   LOLA_CLOCK_TYPE_INTERNAL) {
+		/* internal clocks allowed */
+		freq = chip->clock.sample_clock[idx].freq;
+		valid = true;
+	}
+
+	if (!freq || !valid)
+		return -EINVAL;
+
+	if (!check_gran_clock_compatibility(chip, chip->granularity, freq))
+		return -EINVAL;
+
+	if (idx != chip->clock.cur_index) {
+		int err = lola_set_clock_index(chip, idx);
+		if (err < 0)
+			return err;
+		/* update new settings */
+		chip->clock.cur_index = idx;
+		chip->clock.cur_freq = freq;
+		chip->clock.cur_valid = true;
+	}
+	return 0;
+}
+
+int lola_set_sample_rate(struct lola *chip, int rate)
+{
+	int i;
+
+	if (chip->clock.cur_freq == rate && chip->clock.cur_valid)
+		return 0;
+	/* search for new dwClockIndex */
+	for (i = 0; i < chip->clock.items; i++) {
+		if (chip->clock.sample_clock[i].type == LOLA_CLOCK_TYPE_INTERNAL &&
+		    chip->clock.sample_clock[i].freq == rate)
+			break;
+	}
+	if (i >= chip->clock.items)
+		return -EINVAL;
+	return lola_set_clock(chip, i);
+}
+